Publication

Spatially incoherent illumination as a mechanism for cross-talk suppression in wide-field optical coherence tomography

Theo Lasser, Boris Clément Karamata
2004
Journal Articles

Abstract

Comparison of two illumination modes for wide-field optical coherence tomography has revealed that spatially coherent illumination generates coherent cross talk, causing significant image degradation, and that spatially incoherent illumination, with an adequate interferometer design, provides an efficient mechanism for suppression of coherent cross talk. This is shown by comparison of a pulsed laser with a thermal light source for a U.S. Air Force resolution target covered with a scattering solution made from microbeads as well as for an ex vivo tooth. (C) 2004 Optical Society of America.

Official source

https://infoscience.epfl.ch/entities/publication/343d4398-6f22-4c0c-a15c-8d385c57e84b

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Theo Lasser, Boris Clément Karamata
2004
Journal Articles

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/343d4398-6f22-4c0c-a15c-8d385c57e84b

About this result

Related concepts (26)

Optical coherence tomography

Optical coherence tomography (OCT) is an imaging technique that uses low-coherence light to capture micrometer-resolution, two- and three-dimensional images from within optical scattering media (e.g., biological tissue). It is used for medical imaging and industrial nondestructive testing (NDT). Optical coherence tomography is based on low-coherence interferometry, typically employing near-infrared light. The use of relatively long wavelength light allows it to penetrate into the scattering medium.

Pulsed laser

Pulsed operation of lasers refers to any laser not classified as continuous wave, so that the optical power appears in pulses of some duration at some repetition rate. This encompasses a wide range of technologies addressing a number of different motivations. Some lasers are pulsed simply because they cannot be run in continuous mode. In other cases the application requires the production of pulses having as large an energy as possible.

Laser

A laser is a device that emits light through a process of optical amplification based on the stimulated emission of electromagnetic radiation. The word laser is an anacronym that originated as an acronym for light amplification by stimulated emission of radiation. The first laser was built in 1960 by Theodore Maiman at Hughes Research Laboratories, based on theoretical work by Charles H. Townes and Arthur Leonard Schawlow. A laser differs from other sources of light in that it emits light that is coherent.

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Spatially incoherent illumination as a mechanism for cross-talk suppression in wide-field optical coherence tomography

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